package com.itheima.tanhua.server.interceptor;

import com.itheima.tanhua.common.utils.JwtUtils;
import com.itheima.tanhua.server.holder.TokenHolder;
import io.jsonwebtoken.Claims;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TokenInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("Authorization");
        boolean verifyToken = JwtUtils.verifyToken(token);
        if (!verifyToken) {
            response.setStatus(401);
            return false;
        }

        Claims claims = JwtUtils.getClaims(token);
        TokenHolder.set((String) claims.get("id"));
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request,
                                HttpServletResponse response,
                                Object handler,
                                Exception ex) throws Exception {
        TokenHolder.remove();
    }
}